Boring tool



W. MICHALCZYK.

BORING TOOL.

APPLICATION FILED Amm, 1921.

all gQ/'ql Patented Nov. 28, w22,

2 SHEETS-SHEET I.

WLADYSLAW. Mmmm ZYK W.. MICHALCZYK.

BORING TOOL.

APPLICATION FILED APRA. 192I.

11,436,974- www@ Nov. 28, 1922.

2 SHEETS-sniff 2.

*TELE l wvewtoz WLADYSLAW MICHMZYE taz ` wniinrsnaw iiircnnncarn, on

anni BORING- ,'lOOL.

Application filed April 4,

To aZZ fio/1.0m t may concern.'

Be it known that l, WLAnrsLAiv Micrniif CZYK, a citizen ot the United States, resid-n ing at Elizabethport, in the county oi Union and State 01"' New Jersey, have 1n- Vented certain new and useful improvements in Boring Tools, of which the following is a speciiication.

This invention relates to boring tools such as areused in lathes or drill-presses or like machines.

The invention `has for an object to provide a novel forni of tool whereby large holes can be readily bored in boiler plates, ships plates Vor sheet or other ally. i

More speciiricallyl speaking the invention has for an object to provide a chuck adapted to support a plurality of radially spaced boring tools'- i For further comprehension of the invention, and" of the objects and advantages thereof, reference will be had to the following description and accompanying drawings,` and to the appended claims in which the various novel features of the invention are more particularly set forth;

Fig. 1 of the dra-wings is a "View, partly in side elevation Land partly in axial section, of a boring tool embodying the invention.

Fig. 2 is a face end view thereof.

Fig. 3 is a View similar to 1 but taken at right angles to the latter.

Fig. 4 is a horizontal section on the line l-i of Fig. 3.

Fig. 5 is a detail transverse vertical sectional vieW of the chuck alone, this view being takenlon the line 5 5 of Fig. e.

Fig. 6 is a side view of the chuck alone, looking in the same direction as Fig.

The chuck as here embodied comprises a 'head 10 which may be flattened on opposite sides as shown, this head having an internally threaded neck 10 into which may be screwed one end of a tapered stein 1l whose opposite end is adapted to be engaged in the rotating element of a lathe or other machine in the usual manne-r.

Extending lengthwise through the head 10 is a groove 14 which is cut inwardly from the face thereof, the open side of this groove being covered by a face plate 15 secured as by screws 16 to the face of the head.

Slidably mounted in this groove 14 are a pair of similar blocks 17, the side walls of the groove 14; and the blocks having cc cpei-- 1921. semi no. Maeva.

ating tongue `and groove guide means i8 iornied thereon. rlliese blocks 1"( are adapted to carry a pair of cutting tools as will be presently pointedout.

Located in the groove `14. axially `of the head 10 is a centre-drill holding element 20 which in the forni of an inserted piece localized by means of diminished annular extensions 20 on opposite ends thereof which engage in a suitable aperture in the plate i5 and in a constricted interior end passage' 22, in 'the neck 10, which communicartes with the groove 14. This piece 20 presents a. tapered axial opening in which inay be removably secured the `tapered shank ol a centre-drill 24.' As here shown a pair of alined screws 25 are threaded inwardly through the hea-d 10 on opposite syide thereof, these screws passing ailso tiiii'ough suitable tapped openings `in the wall of the piece 2O and being-"adapted to bear on the shank of drill 26h Thelscre'ws thiishold the drill securely in place and pre-v vent turning movement of the piece 20 As above stated, the blocks 17 are adapted to each hold a cutting. tool, thus providing a pair off cutting tools one on each side of the centre-drill 2d. i These tools or cutters are shown at'30 and may have suitably liorined cutting` ends. The shanks of these tools are in the forni of rectangular bars which are received in suitably ingsl in the blocks 17 these openings eX- tending parallel to the axis of the chuck. The cutters 30 are secured inplace by means of screws 32 which are threaded inwardly through the blocks 17 and bear against plates 33 inserted in the openings 31, these plates bearing in turn against the sides of the cutter Shanks and having the faces thereof which contact with the ciitter Shanks igughened as indicated at 33. The screws on may have square sockets 34 at their outer ends to receive a4 suitable socket wrench for turning purposes- The blocks 17 are arranged to have uni tary adjustment in opposed directions in the grooves lll, and to be maintained at all tnnes eqiiidistant from the aXis of the chuck. To this end an adjusting screw is carried in a lateral offset of the groove 14 and is adapted to engage the sides of the blocks, this screw comprising right and left ends, 36 and 37 respectively, spaced apart by an intermediate Unthreaded portion 38 whereby the screw is swiveled in the head l0.

shaped openJ These right and left hand screw elements 36 and 37 are adapted to engage complementary threads in the adjacent sides of the blocks 17. The face plate l5 is cut out as indicated at l5 to provide apertures for the cutters 30 of sufficient size to allow of the desired adjustment thereof.

For rotating the adjusting screw 36, 3T square sockets such as a() may be formed in the ends thereof to receive a suitable socket wrench, while to Yfacilitate adjustment of the cutting tools 30 between different positions the head l0 may have formed thereon adjacent the screw ends a mark such as ll which is adapted t@ cooperate ywith a series or' marks such as on the screw end.

The centre-drill 24 preferably is formed to present a cutting point 2a which projects beyond the ends of the cutters 30 so as to engage the material in advance thereof, the drill 2a presenting a smooth surface adjacent the cutters 30. j It is believed that the manner or use of my improved boring tool will be apparent from the above description. The cutters 30 are positioned with their cutting points facing outwardly and at the proper distance from one another to cut an opening or the desired site.` When the tool is advanced to the work (indicated at i3 in Fig. l) the centre-drill 24C lirst bores a small aperture therein and the /chuclr vis then moved forward until the cutters 30 engage the work, the centre-drill holding the chuc; properly centered as will be apparent. The cutters 30 revolve around the centre-drill 2li and cut out a hole of the required size.

Having thus described my invention what l claim as new and desire ters Patent of the United States is as lollows:

l. A boring tool comprising a head having a groove extending completely across its to protect by Letface, a face plate covering said groove, a centre drill holding member located in said groove and held against disengagement by said plate, a pair of adjustable cutter holding blocks in said groove between which said drill holding member is located, and a pair orP screws threaded oppositely through the walls or' the head and centre drill holder, for the purpose set forth.

2. e. boring tool comprising a head having a centre drill holder, a pair or adjustable cutter-holding blocks on opposite sides of said rentre drill holder, a screw having right and left hand portions engaging said blocks to adjust the latter oppositely in unison, said blocks being apertured to receive the shanlrs of the cutters, screws threaded through the walls of said blocks in the shank receiving apertures, and plates interposed between the screws and the said blocks, the faces of the plates engaging roughened.

A boring tool comprising a head having a groove extending completely across its tace, a removable face plate covering said groove, a centre drill holding member located in said groove and held against outiv ard displacement by said plate, said holder having opposite ends thereof engaging respectively in an aperture in the said plate and an interior recess in the head communicating with said groove, a pair of adjustable cutter holding blocks in said groove on opposite sides of said centre drill holder, a screw swiveled in the head and having right and left hand portions engaging the respective cutter holding blocks, and apair of opposed screws threaded through said head and centre drill holding member transversely to the iii-st screw.

.in testimony signature.

VVLADYSLAW MICHALCZYK.

whereof I have aliixed my the blocks being.

diminished annular extensions on s 

